It better be really, really, really good.
It seems like every trailer I've ever seen on Newgrounds has been a preview for nothing- the trailer was usually as far as the artist went with it, there was never really anything coming later.
There's a good reason for that, I think. Most designers that are out there actually making Flash movies just don't have the time to put into a trailer. Once the movie's done, it's ready to go. You don't really do that kind of promotion for something this small in scale. Now, if the Fantastic 6.5 turns out to be some amazing two hour event that makes me laugh till I cough up blood, it's great that there was a trailer, and I'm glad that I watched it. But from the looks of the trailer, you haven't even started the series yet. If you had, I would have expected something more than just character names in the trailer, like maybe some action. If the real thing ever comes out, let me know, and I'll apologize for the low rating I'm giving this.
(You should credit the song artist, too, that's the best part of the movie and I know you didn't make it.)